Posthuman Blues

Despite some of the idiotic claims circulating about "machinery" at the Spirit rover site, there actually are a number of tantalizing and unusual rocks. A fair number of them feature somewhat geometric "holes" that could be burrows etched out by Martian organisms, or perhaps some unrecognized crystalline phenomenon. Here are two examples, not necessarily the most impressive:





The good news is that the rover can actually roll right up to these and take a closer look; we don't have to succumb to endless armchair theorizing.